The start of the 21st Century has seen UNHCR helping with major refugee crises in Africa, such as the Democratic Republic of the Congo and Somalia, and Asia, especially the 30-year-old Afghan refugee problem. At the same time, UNHCR has been asked to use its expertise to also help many internally displaced by conflict. Less visibly, it has expanded its role in helping stateless people, a largely overlooked group numbering millions of people in danger of being denied basic rights because they do not have any citizenship. In some parts of the world, such as Africa and Latin America, the original 1951 mandate has been strengthened by agreement on regional legal instruments.